Lamp adapter



March 31, 1925. l 1,531,692

S. M. DAY

LAMP ADAPTER Filed April 18, 1922 sFr-eres istil y irezv sereni sies.

SALISBUR'S? SGNAL COVLANY, GF GATES,

lll. BAY, CF EL@Clt-TESTS?` NEFT YORK, ASSGNOR- TO GENERAL'BAILXVAY ECW YORK, A CORPORATION OF NEW YORK.

LAT/? ADAPTER.

Application filed April 18, 192:?.

To (/ZZ 007mm t m47/ Concern Be it knot-,vn that l, Snrirsnnnr M. DA1', a citizen or the United States or" America., residing at lochester, in the county of Monroe and State ot New York, have invented certain new and useful Improvements in Lamp Adapters, ot which the following is a specification.

This invention relates Ato adapters, and particularly to adapters for positioning an incandescent lain ".l nient with respect to the lens ot a l'gnt signal.

The enipl v nent ot concentrated iilainent lainps ot the incandescenfL for light signaling purposes, requi: such concentrated til nient to be locate-l substantially at the iocns of the lens in order to nroperlv e I Amanips or n iniantity and on iercial scale do not have theirlilaiitely located With respect to the lamp ba due to inaccuracy of manufacture. n orner to properly locate a filament with respect to a lens Without nialring adconcentrate and direct th. this hind inanuta tured i coinn' inents n justinents the tifne the lainp is installed in the sign l it has been proposed to )vide d i Y a ich be churn-)ed be- -ivfcen the l which may l filament lan I to the ala1 t respect to tne ens ted l i d withl re consequently with i L soins tnne before it is to be used, that is, to provide such adaptersV with lainps therein vfor reserve purposes. It has been `found very tedious and alinost impossible for one Worlnnan to install such an adapter on account of the niany parts to be handled, such as, adapter, lens, bezel ring, gasket, bolts, and 'the lilre.

llith the above and other considerations in mind, the principal objects and purposes of the present invention contemplate the.

Aprovision ot an adapter for such light signals which inay be clamped on the lens, thereby providing a unitary structure Which niay be easily installed, and which includes suitable ineens tor adjusting the lilainentot an incandescent lamp with respect to such a-ilzipter and lens. Other objects and ad- -vantages of the present invention will appear as the description thereof progresses.

ln describing the invention in detail, refrenee will be niade 'to the accompanying rawing, in which Fig. l shows a cross-sectional view ot a Serial No. 555,345.

typical light signal casing, having an adapter embodying the present invention applied thereto;

Fig. 2 illustrates an end View of a light unit, comprising-a lens and adapter provided with a lamp 5 and l? ig. .is a side elevation of the device shown in Fig. 2, portions thereof being shown in section for elearness.

ln describing the invention in detail, attention `Vis iirst directed more particularly to Fig. l, which illustrates a typical light signal casing used forrailway signaling purposes. This signal casing comprises a casing` l of general vbof-:slilre shape provided with a cover 2 terminating lin the forni of a' hook-B adapted to hook over the front Wall orp the casing l, and'held in place at the other extreme end ot the easing by a has-p fastener 4, this cover 2 being provided with a handle 5 to facilitate its re` inoval.

rlhe front wall ot' the casing 1 is provided with a large circular opening, Which is provided with an internal 'Hangs 6, thereby providing a seat for supporting a lens 7 4This lens is support-ed inthe usual manner between the gaskets 8 and 9 by a` bezel ring l() `fastened to the casing by bolts li. It'the adapter embodying the present invention is used in connection With this lainp casing, an additional orspacing gasket 12 is inserted between the front Wall of the casing l and the bezel ring 10'. v

This adapter, more clearly illust-rated in Figs. 2 and 8, comprises a tripod, so tospeak, consisting of a base member 13 coinprising a casting of general ring-like shape having an extension lll, and provided with three extending spring arnis l5. These arins are bent to diverge at their tree ends and terminate in substantially parallel extensions 16, to embrace the outside edge of the lens 7. Although these arnis are constructed of spring material they are rather stitl', so that the base of the adapter carrying the incandescent lamp 1T will be tirinly supported when the adapter and lens are held in place by the bezel ring. Near the free end orp each of the arins is provided a springclip 18 or general lll-shape, This spring-clip is bent to torin hooks adapted to engage the outside face of the rini of the lens 7.

The extension let is provided with a saw-V slot 19, as indicated, and is bored in a direcA ...Om-M.

lil

j lin kept' in stock,

tion parallel to the saw-slot li) in a inanner to provide a spherical hollow which adapted to'receive a .split-slecve-QO hav a sphericalexiernalsurtace. in this sleeve is slidably supported n lo splita lainp socket 2l of the well-known bayonet type having' a .genera-l cylindrical external surface, which is adapted to receive an incandescent lan'ip ott troni the oi'awinfY inav l 1 *x97 u l pivotaliy with respect This socket the After such be firmly oci;

lainp 1T shown is pro- 22 vand which the other :of the`filainentsv burns out, signal-k ing therewith is still possible,but`the wealt-k as an indicaintact, and

ness of the light source serves tion that only one iilanient is that the lainp should be renewed'.

A terminal board 2% is screw against the extension i4: by screw 25. tern'iinal" 'board trete ned rIhis is 'provided with binding` posts 26 perinanentlyin electrical Contact with 'the contacts ot the' sockets 2l, which connection ot' the supply facilitateV ready wires (not shown) tothe adapter.

In practicing f the present :invention inay be' assuifn'edy that a? largeY nuinber of which consists of a suitable lanipl casing;` hav-` Sg nal installations' have been inade, each ot ing a light unit of the typetjust described. A` large nuinber of adapters are preferably centra-ted filament lainp, preferably of or in reserve, having a conthe two-filament type, located at the focal point of a lens of the kind used in such installa tions. It nowone ofthe filaments of: one of the lightV signals burns out,

any

the p articular signal will stillbe effective', but it inay be readilyY observed thatonly one filament isl that the lainp should therefore intact, and be replaced.

In replacinfr such a lain'p vthe lens, 'adapter and burnt Voutlai'np are Vall reinoved gether," the lens" is then VreinovedA from' tothe adapter, and this lens is placed into a different adapter "having a new lainpwhich has had its filainent previously adjusted with respectto a lensV ofthe saine focal dnnensions. respect to the lens inay any* suitable inanner,

This adjustinent of the filainent with be accomplished in but is preferably done by 'placing Athe adapter in a suitable `pro-- vided with suitable sighting` devices, whereby theV relative position ofthe `fil-an'ient and rl`his new i -f theJ adapter inayA be observed.r light unit comprising,` the saine lens an tary construction afl'orded by an Ventire. light unit coi'nprising a lens,

different adapter provided with a new lamp ris then placed in the lens opening of the lichtv sional casinc and is clain )ed in ilace o to C? It should be especially ftening the bezel ring in place. if extreine in focusing the iiiainent ota signal accuracy of tiiis lrind isfrequired, th reserve units riiay also? include the lens with which the adapter is to beused. ln this'event the adapter and' incandescent lainp is interchanged at. each replacen'ient of a burnt out lainp.v

lt shouldbe noted that since this adapter s supported directly froin the lens of a ight signal., it inay be kapplied to a signal: which was originally constructed and installed as an oil lainp signal, by applying the ada-u` Ater directly a spacing gasket, such as the gasket 12, being possibly necessary to aiilord rooin for the free ends and hooks, of the arins l5.

Having thus shown and described one speto'the lensl of such signal, y

ciipic en'ibodiinent of iny invention, l. de f to have vit vunderstood that this does not er, haast the idea of ineans of carrying;` out this invention, but merely illustrates its nature and inodeof operation.

`Wh at desire to secure by Letters l) is l i l. iiin adapter for supporting' inca-aides cent lamps of coininercial.manufacture in liglit signals so that the filament ot the lamp has theproper relation to the lens 'ofl the siiin'al comprising', a base ineinber, a lainpi` socket adjustably tastenedfto said base nieniber, three relativelyy stitiarnis extending rroin said base ineinber havingy their free atent.

ends shaped to engage the outery edge and ff the inside face oft ai lens, and relatively thin spring strips fastened to said arins andc shaped to engage lens.

2. An adapter lainps comprising, socket supportedw .by

the outside face of said for supporting electric a'base ineinber, a lainp ber and having their ends shaped to cinbrace the outer'edge and the inside tace oi" a lens iii-clitiei.entradial planes, and alioolr shaped spring` vclipfsecured to ther-trecend ofeach o'l said arras and shaped 'to engage the front Jrace of said lens in a citierent radial plane than does the arin to which it is secured.

.In testiin'ony wherco't` l hereby affix iny signature. e

.said base inen'iber-,-` spring arins extending troni said base inem-- 

